Character, Spawner, GameplayScreen, and Sprite changes
Character:
* Cleaned some of the Rectangle shit in `Collision()`.
Spawner:
* Renamed `InitSpawner()` to `Initialize()` for consistency.
* Removed font from constructor, now loads the font on its own.
GameplayScreen:
* Removed new ContentManager (it is not needed), replaced with `Game.Content`.
Sprite:
* Created properties for Position and Origin.

Signed-off-by: David Dorfman <wiz3kid@gmail.com>